The total population of Iraq is 39,339,753 people. The people of Iraq speak Arabic and Kurdish. The linguistic diversity of Iraq is diverse according to a fractionation scale, which for Iraq is 0.3694. The average age is about 21.5 years. Life expectancy in Iraq is 70. Female fertility rate in Iraq is 4.2. Around 27% of Iraq's population is obese. Ethnic diversity is diverse according to a fractionation scale, which for Iraq is 0.3689. Details of the language, religion, age, gender distribution and advancement of the people of Iraq can be found in the sections below, as well as the section on education in the country.

Population
In Iraq, the population density is 83 people per square kilometer (216 per square mile). Based on these statistics, this country is considered sparsely populated. The total population of Iraq is 39,339,753 people. Iraq has approximately 95,780 foreign immigrants. Immigrants in Iraq account for 0.1 percent of the total number of immigrants worldwide. Immigrants in Iraq account for 0.3 percent of the total number of immigrants worldwide. The ethnic diversity of Iraq is diverse according to an ethnicity-based fractionation scale. Ethnic Fractionation (EF) deals with the number, size, socioeconomic distribution, and geographic location of diverse cultural groups, usually within a state or some other demarcated area. Specific cultural characteristics can refer to language, skin color, religion, ethnicity, customs and traditions, history, or other distinctive criteria, alone or in combination. These characteristics are often used for social exclusion and power monopolization. The index of ethnic fractionation in Iraq is 0.3689. This means that there is some diversity in Iraq, although all people can still be divided into a relatively small number of major ethnic groups. EF is usually measured as 1 minus the Herfindahl concentration index of ethnolinguistic group proportions, which reflects the probability that two randomly drawn individuals from the population belong to different groups. The theoretical maximum of EF of 1 means that each person belongs to a different group. Read below the statistics of Iraq on the average age and gender distribution at different ages.

Age
The average age is about 21.5 years. The average age of men is 21.4, the average age of women is 21.6.

Gender
The sex ratio, or number of males per female (estimated at birth), is 1.05. It can be further broken down into the following categories: sex ratio below 15 - 1.03; sex ratio from 15 to 64 - 1.03; sex ratio over 64 - 0.9; Overall sex ratio - 1.02. The overall sex ratio differs from the sex ratio estimated at birth. This is because some newborns are included in the sex ratio estimated at birth, but die within the first few weeks of life and are not included in the overall sex ratio.

Religion
Iraq's majority religion is Islam, whose adherents make up 99% of all religious believers in the country. Islam (Arabic: الإسلام‎‎) is a monotheistic and Abrahamic religion articulated through the Qur'an, a religious text believed to be the literal word of God (Allāh) by its followers and by the teachings and norms for the vast majority of followers becomes an example (called Sunna, Arabic سنة, composed of reports, called Hadith, Arabic حديث) of Muhammad, who is considered by most of them to be the last prophet of God. A follower of Islam is called a Muslim. Besides Islam, there are several other religions in the country. Other religions in Iraq are Islam, Hinduism, Buddhism, folk religions, Judaism. Iraq's religious diversity is diverse according to a fractionation scale based on the number of religions in Iraq. The index of religious fractionation in Iraq is 0.4844. This score means that within the country there is one major religion and several other minor beliefs.